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build: add a config option for passing the top-level make jobserver to packages that have parallel build enabled, significantly improves parallelization and gets rid of CPU overcommit during intra-package parallel builds

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33414 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
2012-09-15 10:21:24 +00:00
parent 9d164b87ca
commit 1f87d10e85
3 changed files with 18 additions and 3 deletions
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8
include/package.mk
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@@ -15,11 +15,17 @@ PKG_MD5SUM ?= unknown
PKG_BUILD_PARALLEL ?=
PKG_INFO_DIR := $(STAGING_DIR)/pkginfo
ifneq ($(CONFIG_PKG_BUILD_USE_JOBSERVER),)
MAKE_J:=$(MAKE_JOBSERVER)
else
MAKE_J:=-j$(CONFIG_PKG_BUILD_JOBS)
endif
ifeq ($(strip $(PKG_BUILD_PARALLEL)),0)
PKG_JOBS?=-j1
else
PKG_JOBS?=$(if $(PKG_BUILD_PARALLEL)$(CONFIG_PKG_DEFAULT_PARALLEL),\
$(if $(CONFIG_PKG_BUILD_PARALLEL),-j$(CONFIG_PKG_BUILD_JOBS),-j1),-j1)
$(if $(CONFIG_PKG_BUILD_PARALLEL),$(MAKE_J),-j1),-j1)
endif
include $(INCLUDE_DIR)/prereq.mk